Patent US5276704A successfully refreshed from Google Patents.
US5276704A
Expired / Lapsed
US
⏱️ 0.0 years remaining
SAWC phase detection method and apparatus
Assignee: Intel Corp
•
Filing: 1992-11-04
•
Granted: 1994-01-04
•
Expires: 2012-11-04
Abstract
Abstract A phase coded surface-acoustic-wave-correlator device used with a spread spectrum receiver. The spread spectrum receiver receives a spread spectrum signal which has a carrier signal with a phase modulated by a data-bit sequence and by a chip sequence. The chip sequence is repetitively and coherently generated with each bit of the data-bit sequence and is modulated with one period of the chip sequence. The surface-acoustic-wave-correlator device is phase matched to the chip sequence. The surface-acoustic-wave-correlator device outputs a post-SAWC-signal pulse having the carrier signal phase modulated by the data-bit sequence. A phase detector detects the phase of the carrier signal and generates the data-bit sequence.
Inventors
- 👤 Robert C. Dixon
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 04:34
CPC Classifications
H; H04; H04B; H04B1/00; H04B1/69; H04B1/707; H04B1/709; H04B1/7093; H04L; H04L27/00; H04L27/18; H04L27/22; H04L27/233; H04L27/2334
Claims Analysis
Total Claims: 38
Claim 1
Independent Claim
159 words
A SAWC apparatus comprising: data-sequence-generating means for generating a data-bit sequence having first data bits and second data bits; chip-sequence-generating means coupled to said data-sequence-generating means for repetitively generating coherently with the data-bit sequence a chip sequence; chip-sequence-modulating means coupled to said data-sequence-generating means and said chip-sequence-generating means, responsive to a first data bit for outputting the chip sequence, and responsive to a second data bit for phase shifting the chip sequence and outputting an phase shifted chip sequence; carrier-modulating means coupled to said chip-sequence-modulating means, and responsive to the chip sequence and phase shifted chip sequence, for modulating a phase of a carrier signal; a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal for outputting a post-SAWC-signal pulse having the first data phase or second data phase; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the data-bit sequence.
Claim 2
Dependent Claim
159 words
A SAWC apparatus comprising: data-sequence-generating means for generating a data-bit sequence having first data bits and second data bits; chip-sequence-generating means coupled to said data-sequence-generating means for repetitively generating coherently with the data-bit sequence a chip sequence; chip-sequence-modulating means coupled to said data-sequence-generating means and said chip-sequence-generating means, responsive to a first data bit for outputting the chip sequence, and responsive to a second data bit for phase shifting the chip sequence and outputting an phase shifted chip sequence; carrier-modulating means coupled to said chip-sequence-modulating means, and responsive to the chip sequence and phase shifted chip sequence, for modulating a phase of a carrier signal; a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal for outputting a post-SAWC-signal pulse having the first data phase or second data phase; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the data-bit sequence.
Claim 3
Dependent Claim
142 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal base modulated by a data-bit sequence and by a chip sequence, with the chip sequence being repetitively generated and coherently modulating each bit of the data-bit sequence with one period of the chip sequence, the improvement comprising: a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-bit sequence ad chip sequence, for outputting a post-SAWC-signal pulse having the phase determined by the data-bit sequence; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the data-bit sequence, wherein said phase-detecting generating means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing the phase of adjacent bits of the carrier signal for generating the data-bit sequence.
Claim 4
Dependent Claim
142 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal base modulated by a data-bit sequence and by a chip sequence, with the chip sequence being repetitively generated and coherently modulating each bit of the data-bit sequence with one period of the chip sequence, the improvement comprising: a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-bit sequence ad chip sequence, for outputting a post-SAWC-signal pulse having the phase determined by the data-bit sequence; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the data-bit sequence, wherein said phase-detecting generating means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing the phase of adjacent bits of the carrier signal for generating the data-bit sequence.
Claim 5
Dependent Claim
172 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-bit sequence and by a chip sequence, with the chip sequence being repetitively generated and coherently modulating each bit of the data-bit sequence with one period of the chip sequence, the improvement comprising: a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-bit sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase determined by the data-bit sequence; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the data-bit sequence, wherein said phase-detecting generating means includes: a phase-locked-loop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the data-bit sequence.
Claim 6
Dependent Claim
172 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-bit sequence and by a chip sequence, with the chip sequence being repetitively generated and coherently modulating each bit of the data-bit sequence with one period of the chip sequence, the improvement comprising: a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-bit sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase determined by the data-bit sequence; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the data-bit sequence, wherein said phase-detecting generating means includes: a phase-locked-loop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the data-bit sequence.
Claim 7
Dependent Claim
128 words
A phase coded spread spectrum SAWC system comprising: data-sequence-generating means for generating a data-symbol sequence having a plurality of data symbols; chip-sequence-generating means coupled to said data-sequence-generating means for repetitively generating a chip sequence; carrier-modulating means coupled to said data-sequence-generating means and said chip-sequence-generating means, for modulating a phase of a carrier signal with each chip of the chip sequence and each data-symbol of the plurality of data symbols, respectively; a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol modulating the carrier signal, respectively; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol.
Claim 8
Dependent Claim
128 words
A phase coded spread spectrum SAWC system comprising: data-sequence-generating means for generating a data-symbol sequence having a plurality of data symbols; chip-sequence-generating means coupled to said data-sequence-generating means for repetitively generating a chip sequence; carrier-modulating means coupled to said data-sequence-generating means and said chip-sequence-generating means, for modulating a phase of a carrier signal with each chip of the chip sequence and each data-symbol of the plurality of data symbols, respectively; a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol modulating the carrier signal, respectively; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol.
Claim 9
Dependent Claim
147 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by a chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol modulating the carrier signal; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol, wherein said phase-detecting generating means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing the phase of adjacent symbols of the carrier signal for generating the corresponding data symbol.
Claim 10
Dependent Claim
147 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by a chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol modulating the carrier signal; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol, wherein said phase-detecting generating means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing the phase of adjacent symbols of the carrier signal for generating the corresponding data symbol.
Claim 11
Dependent Claim
177 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by a chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol modulating the carrier signal; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol, wherein said phase-detecting generating means includes: a phase-locked-lop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the corresponding data symbol.
Claim 12
Dependent Claim
177 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by a chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol modulating the carrier signal; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol, wherein said phase-detecting generating means includes: a phase-locked-lop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the corresponding data symbol.
Claim 13
Dependent Claim
130 words
A phase coded spread spectrum SAWC system comprising: data-sequence-generating means for generating a data-symbol sequence; chip-sequence-generating means for repetitively generating a chip sequence; chip-sequence-modulating means responsive to a first data symbol for outputting the chip sequence, and responsive to a second data symbol for phase shifting the chip sequence and outputting a phase shifted chip sequence; carrier-modulating means responsive to the chip sequence and phase shifted chip sequence, for modulating a carrier signal; a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal for outputting a post-SAWC-signal pulse having a first phase or a second phase corresponding the chip sequence or phase shifted chip sequence, respectively; and phase-detecting means responsive to the phase of the post-SAWC-signal pulse for generating the data-symbol sequence.
Claim 14
Dependent Claim
130 words
A phase coded spread spectrum SAWC system comprising: data-sequence-generating means for generating a data-symbol sequence; chip-sequence-generating means for repetitively generating a chip sequence; chip-sequence-modulating means responsive to a first data symbol for outputting the chip sequence, and responsive to a second data symbol for phase shifting the chip sequence and outputting a phase shifted chip sequence; carrier-modulating means responsive to the chip sequence and phase shifted chip sequence, for modulating a carrier signal; a surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal for outputting a post-SAWC-signal pulse having a first phase or a second phase corresponding the chip sequence or phase shifted chip sequence, respectively; and phase-detecting means responsive to the phase of the post-SAWC-signal pulse for generating the data-symbol sequence.
Claim 15
Dependent Claim
141 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by at least a first chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: at least one surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol sequence; ad phase-detecting means responsive to the phase of the post-SAWC-signal pulse for generating the data symbol, wherein said phase-detecting generating means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing the phase of adjacent symbols of the carrier signal for generating the data symbol.
Claim 16
Dependent Claim
141 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by at least a first chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: at least one surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol sequence; ad phase-detecting means responsive to the phase of the post-SAWC-signal pulse for generating the data symbol, wherein said phase-detecting generating means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing the phase of adjacent symbols of the carrier signal for generating the data symbol.
Claim 17
Dependent Claim
172 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by at least a first chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: at least one surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol sequence; and phase-detecting means responsive to the phase of the post-SAWC-signal pulse for generating the data symbol, wherein said phase-detecting generating means includes: a phase-locked-loop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the corresponding data symbol.
Claim 18
Dependent Claim
172 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by at least a first chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: at least one surface-acoustic-wave correlator phase matched to the chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having the phase corresponding to the data-symbol sequence; and phase-detecting means responsive to the phase of the post-SAWC-signal pulse for generating the data symbol, wherein said phase-detecting generating means includes: a phase-locked-loop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the corresponding data symbol.
Claim 19
Dependent Claim
116 words
A phase coded spread spectrum SAWC system comprising: data-sequence-generating means for generating a data-symbol sequence having at least two data symbols; chip-sequence-generating means for repetitively generating at least one chip sequence; carrier-modulating means for phase modulating a carrier signal with each chip of the chip sequence and each data-symbol of the data-symbol sequence, respectively; at least one surface-acoustic-wave correlator phase matched to at least one chip sequence and responsive to the phase of the carrier signal for outputting a post-SAWC-signal pulse having the phase corresponding to the data symbol modulating the carrier signal; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol.
Claim 20
Dependent Claim
116 words
A phase coded spread spectrum SAWC system comprising: data-sequence-generating means for generating a data-symbol sequence having at least two data symbols; chip-sequence-generating means for repetitively generating at least one chip sequence; carrier-modulating means for phase modulating a carrier signal with each chip of the chip sequence and each data-symbol of the data-symbol sequence, respectively; at least one surface-acoustic-wave correlator phase matched to at least one chip sequence and responsive to the phase of the carrier signal for outputting a post-SAWC-signal pulse having the phase corresponding to the data symbol modulating the carrier signal; and phase-detecting means coupled to said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol.
Claim 21
Dependent Claim
153 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by at least one chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: at least one surface-acoustic-wave correlator phase matched to at least one chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having a phase corresponding to the data-symbol modulating the carrier signal; and phase-detecting means coupled ti said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol, wherein said phase-detecting generating means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing the phase of adjacent symbols of the carrier signal for generating the corresponding data symbol.
Claim 22
Dependent Claim
153 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data-symbol sequence and by at least one chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: at least one surface-acoustic-wave correlator phase matched to at least one chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal pulse having a phase corresponding to the data-symbol modulating the carrier signal; and phase-detecting means coupled ti said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol, wherein said phase-detecting generating means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing the phase of adjacent symbols of the carrier signal for generating the corresponding data symbol.
Claim 23
Dependent Claim
192 words
A SAWC receiver for use on a spread spectrum signal having a carrie signal phase modulated by a data-symbol sequence and by at least one chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: at least one surface-acoustic-wave correlator phase matched to at least one chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal sequence and chip sequence, for outputting a post-SAWC-signal pulse having a phase corresponding to the data symbol modulating the carrier signal; and phase-detecting means coupled ti said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol, wherein said phase-detecting generating means includes: a phase-locked-loop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the corresponding data symbol.
Claim 24
Dependent Claim
192 words
A SAWC receiver for use on a spread spectrum signal having a carrie signal phase modulated by a data-symbol sequence and by at least one chip sequence, with the chip sequence being repetitively generated and coherently modulating each symbol of the data-symbol sequence with one period of the chip sequence, the improvement comprising: at least one surface-acoustic-wave correlator phase matched to at least one chip sequence and responsive to the phase of the carrier signal modulated with the data-symbol sequence and chip sequence, for outputting a post-SAWC-signal sequence and chip sequence, for outputting a post-SAWC-signal pulse having a phase corresponding to the data symbol modulating the carrier signal; and phase-detecting means coupled ti said surface-acoustic-wave correlator and responsive to the phase of the post-SAWC-signal pulse for generating the corresponding data symbol, wherein said phase-detecting generating means includes: a phase-locked-loop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the corresponding data symbol.
Claim 25
Independent Claim
141 words
A method using a SAWC comprising the steps of: generating a data-bit sequence having first data bits and second data bits; repetitively generating a chip sequence; modulating a carrier signal with the chip sequence in response to a first data bit; phase shifting the chip sequence and modulating the carrier signal with a phase shifted chip sequence in responsive to a second data bit; outputting from said SAWC a post-SAWC-signal pulse having a first phase or a second phase in response to the carrier signal being modulated with the chip sequence or the phase shifted chip sequence, respectively; detecting the first or second phase of the post-SAWC-signal pulse; generating the first data bit in response to detecting the first phase on the post-SAWC-signal pulse; and generating the second data bit in response to detecting the second phase on the post-SAWC-signal pulse.
Claim 26
Independent Claim
141 words
A method using a SAWC comprising the steps of: generating a data-bit sequence having first data bits and second data bits; repetitively generating a chip sequence; modulating a carrier signal with the chip sequence in response to a first data bit; phase shifting the chip sequence and modulating the carrier signal with a phase shifted chip sequence in responsive to a second data bit; outputting from said SAWC a post-SAWC-signal pulse having a first phase or a second phase in response to the carrier signal being modulated with the chip sequence or the phase shifted chip sequence, respectively; detecting the first or second phase of the post-SAWC-signal pulse; generating the first data bit in response to detecting the first phase on the post-SAWC-signal pulse; and generating the second data bit in response to detecting the second phase on the post-SAWC-signal pulse.
Claim 27
Independent Claim
123 words
A method using a phase coded spread spectrum SAWC receiver on a spread spectrum signal having a carrier signal phase modulated by a data-bit sequence and by a chip sequence, with the chip sequence being repetitively generated and each bit of the data-bit sequence modulated with one period of the chip sequence, the improvement comprising the steps of: correlating with a surface-acoustic-wave-correlator device, the chip sequence and the carrier signal modulated with the data-bit sequence and chip sequence and outputting a post-SAWC-signal pulse having the phase modulated by the data-bit sequence; and generating the data-bit sequence from the phase of the post-SAWC-signal pulse, including the step of: comparing the phase of adjacent bit times of the carrier signal for generating the data-bit sequence.
Claim 28
Independent Claim
123 words
A method using a phase coded spread spectrum SAWC receiver on a spread spectrum signal having a carrier signal phase modulated by a data-bit sequence and by a chip sequence, with the chip sequence being repetitively generated and each bit of the data-bit sequence modulated with one period of the chip sequence, the improvement comprising the steps of: correlating with a surface-acoustic-wave-correlator device, the chip sequence and the carrier signal modulated with the data-bit sequence and chip sequence and outputting a post-SAWC-signal pulse having the phase modulated by the data-bit sequence; and generating the data-bit sequence from the phase of the post-SAWC-signal pulse, including the step of: comparing the phase of adjacent bit times of the carrier signal for generating the data-bit sequence.
Claim 29
Independent Claim
143 words
A method using a phase coded spread spectrum SAWC receiver on a spread spectrum signal having a carrier signal phase modulated by a data-bit sequence and by a chip sequence, what the chip sequence being repetitively generated and each bit of the data-bit sequence modulated with one period of the chip sequence, the improvement comprising the steps of: correlating with a surface-acoustic-wave-correlator device, the chip sequence and the carrier signal modulated with the data-bit sequence and chip sequence and outputting a post-SAWC-signal pulse having the phase modulated by the data-bit sequence; and generating the data-bit sequence from the phase of the post-SAWC-signal pulse, including the steps of: locking phase and frequency of a PLL signal with a phase-locked-loop device onto the post-SAWC-signal pulse; and comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the data-bit sequence.
Claim 30
Independent Claim
143 words
A method using a phase coded spread spectrum SAWC receiver on a spread spectrum signal having a carrier signal phase modulated by a data-bit sequence and by a chip sequence, what the chip sequence being repetitively generated and each bit of the data-bit sequence modulated with one period of the chip sequence, the improvement comprising the steps of: correlating with a surface-acoustic-wave-correlator device, the chip sequence and the carrier signal modulated with the data-bit sequence and chip sequence and outputting a post-SAWC-signal pulse having the phase modulated by the data-bit sequence; and generating the data-bit sequence from the phase of the post-SAWC-signal pulse, including the steps of: locking phase and frequency of a PLL signal with a phase-locked-loop device onto the post-SAWC-signal pulse; and comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the data-bit sequence.
Claim 31
Dependent Claim
156 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data symbol sequence and by a plurality of chip sequence, with the chip sequences being repetitively generated and a pair of symbols of the data symbol sequence modulated with one period of one of the chip sequences and a phase shifted version of one of the chip sequences, repetitively, the improvement comprising: a plurality of surface-acoustic-wave correlators with each surface-acoustic-wave correlator phase matched to a chip sequence of the plurality of chip sequences and responsive to the carrier signal phase modulated with a data symbol sequence and chip sequence, respectively, for outputting a post-SAWC-signal pulse; and phase-detecting means responsive to the post-SAWC-signal pulse for generating the data symbol sequence, wherein said phase-detecting means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing phase of adjacent symbols of the carrier signal for generating the data symbol sequence.
Claim 32
Dependent Claim
156 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data symbol sequence and by a plurality of chip sequence, with the chip sequences being repetitively generated and a pair of symbols of the data symbol sequence modulated with one period of one of the chip sequences and a phase shifted version of one of the chip sequences, repetitively, the improvement comprising: a plurality of surface-acoustic-wave correlators with each surface-acoustic-wave correlator phase matched to a chip sequence of the plurality of chip sequences and responsive to the carrier signal phase modulated with a data symbol sequence and chip sequence, respectively, for outputting a post-SAWC-signal pulse; and phase-detecting means responsive to the post-SAWC-signal pulse for generating the data symbol sequence, wherein said phase-detecting means includes: means coupled to said surface-acoustic-wave-correlator device and responsive to comparing phase of adjacent symbols of the carrier signal for generating the data symbol sequence.
Claim 33
Dependent Claim
186 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data symbol sequence and by a plurality of chip sequences, with the chip sequences being repetitively generated and a pair of symbols of the data symbol sequence modulated with one period of one of the chip sequences and a phase shifted version of one of the chip sequences, respectively, the improvement comprising: a plurality of surface-acoustic-wave correlators with each surface-acoustic-wave correlator phase matched to a chip sequence of the plurality of chip sequences and responsive to the carrier signal phase modulated with a data symbol sequence and chip sequence, respectively, for outputting a post-SAWC-signal pulse; and phase-detecting means responsive to the post-SAWC-signal pulse for generating the data symbol sequence, wherein said phase-detecting means includes: a phase-locked-loop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing phase of the PLL signal with the phase of the post-SAWC-signal pulse for generating the data symbol sequence.
Claim 34
Dependent Claim
186 words
A SAWC receiver for use on a spread spectrum signal having a carrier signal phase modulated by a data symbol sequence and by a plurality of chip sequences, with the chip sequences being repetitively generated and a pair of symbols of the data symbol sequence modulated with one period of one of the chip sequences and a phase shifted version of one of the chip sequences, respectively, the improvement comprising: a plurality of surface-acoustic-wave correlators with each surface-acoustic-wave correlator phase matched to a chip sequence of the plurality of chip sequences and responsive to the carrier signal phase modulated with a data symbol sequence and chip sequence, respectively, for outputting a post-SAWC-signal pulse; and phase-detecting means responsive to the post-SAWC-signal pulse for generating the data symbol sequence, wherein said phase-detecting means includes: a phase-locked-loop device coupled to said surface-acoustic-wave-correlator device and responsive to the post-SAWC-signal pulse for locking phase and frequency of a PLL signal onto the post-SAWC-signal pulse; and means coupled to said phase-locked-loop device for comparing phase of the PLL signal with the phase of the post-SAWC-signal pulse for generating the data symbol sequence.
Claim 35
Independent Claim
142 words
A method using a SAWC receiver on a spread spectrum signal having a carrier signal phase modulated by a data symbol sequence and by at least two chip sequences, with the chip sequences being repetitively generated and a pair of symbols of the data symbol sequence modulated with one period of one of the chip sequences and a phase shifted version of one of the chip sequences, respectively, the improvement comprising the steps of: correlating, with a surface-acoustic-wave correlator, at least one of the chip sequences and the carrier signal modulated with one of the data symbol sequences and a corresponding chip sequence; outputting a post-SAWC-signal pulse from said surface-acoustic-wave-correlator device; and generating the data symbol sequence form the post-SAWC-signal pulse, further including the step of: comparing the phase of adjacent symbols of the carrier signal for generating the data symbol sequence.
Claim 36
Independent Claim
142 words
A method using a SAWC receiver on a spread spectrum signal having a carrier signal phase modulated by a data symbol sequence and by at least two chip sequences, with the chip sequences being repetitively generated and a pair of symbols of the data symbol sequence modulated with one period of one of the chip sequences and a phase shifted version of one of the chip sequences, respectively, the improvement comprising the steps of: correlating, with a surface-acoustic-wave correlator, at least one of the chip sequences and the carrier signal modulated with one of the data symbol sequences and a corresponding chip sequence; outputting a post-SAWC-signal pulse from said surface-acoustic-wave-correlator device; and generating the data symbol sequence form the post-SAWC-signal pulse, further including the step of: comparing the phase of adjacent symbols of the carrier signal for generating the data symbol sequence.
Claim 37
Independent Claim
163 words
A method using a SAWC receiver on a spread spectrum signal having a carrier signal phase modulated by a data symbol sequence and by at least two chip sequences, with the chip sequences being repetitively generated and a pair of symbols of the data symbol sequence modulated with one period of one of the chip sequences and a phase shifted version of one of the chip sequences, respectively, the improvement comprising the steps of: correlating, with a surface-acoustic-wave correlator, at least one of the chip sequences and the carrier signal modulated with one of the data symbol sequences and a corresponding chip sequence; outputting a post-SAWC-signal pulse from said surface-acoustic-wave-correlator device; and generating the data symbol sequence from the post-SAWC-signal pulse, further including the step of: locking phase and frequency of a PLL signal with a phase-locked-loop device onto the post-SAWC-signal pulse; and comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the data symbol sequence.
Claim 38
Independent Claim
163 words
A method using a SAWC receiver on a spread spectrum signal having a carrier signal phase modulated by a data symbol sequence and by at least two chip sequences, with the chip sequences being repetitively generated and a pair of symbols of the data symbol sequence modulated with one period of one of the chip sequences and a phase shifted version of one of the chip sequences, respectively, the improvement comprising the steps of: correlating, with a surface-acoustic-wave correlator, at least one of the chip sequences and the carrier signal modulated with one of the data symbol sequences and a corresponding chip sequence; outputting a post-SAWC-signal pulse from said surface-acoustic-wave-correlator device; and generating the data symbol sequence from the post-SAWC-signal pulse, further including the step of: locking phase and frequency of a PLL signal with a phase-locked-loop device onto the post-SAWC-signal pulse; and comparing the phase of the PLL signal with the phase of the post-SAWC-signal pulse and generating the data symbol sequence.
References Cited (Backward Citations)
US27738A
Cited
US4247942A
Cited
US4051448A
Cited
US3934203A
Cited
US4653069A
Cited
US3978436A
Cited
US4217563A
Cited
US4021898A
Cited
US4163944A
Cited
US4164628A
Cited
US4100498A
Cited
US4131484A
Cited
US4222115A
Cited
US4562370A
Cited
US4314393A
Cited
US4445256A
Cited
US4355411A
Cited
US4455651A
Cited
US4418393A
Cited
US4418425A
Cited
US4525835A
Cited
US4432089A
Cited
US4517679A
Cited
US4456793A
Cited
US4563774A
Cited
US4484028A
Cited
US4787093A
Cited
US4550414A
Cited
US4606039A
Cited
US4612637A
Cited
US4649549A
Cited
US4707839A
Cited
US4680785A
Cited
US4660164A
Cited
US4642505A
Cited
US4601047A
Cited
US4561089A
Cited
US4567588A
Cited
US4691326A
Cited
US4569062A
Cited
US4745378A
Cited
US4621365A
Cited
US4979186A
Cited
US4641317A
Cited
US4813057A
Cited
US5005183A
Cited
US4866732A
Cited
US4769812A
Cited
US4662854A
Cited
US4742512A
Cited
US4754453A
Cited
US4918689A
Cited
US4672254A
Cited
US4672658A
Cited
US4701904A
Cited
US4647863A
Cited
US4724435A
Cited
US4718080A
Cited
US4703474A
Cited
US4815106A
Cited
US4837786A
Cited
US4807222A
Cited
US4837802A
Cited
US4860307A
Cited
US4754473A
Cited
US4901307A
Cited
US4804938A
Cited
US4759078A
Cited
US4759034A
Cited
US4833702A
Cited
US4893327A
Cited
US4905221A
Cited
US4894842A
Cited
US4800885A
Cited
US4878238A
Cited
US4965759A
Cited
US4805208A
Cited
US4995083A
Cited
US4984247A
Cited
US5023887A
Cited
US4943973A
Cited
US5042050A
Cited
US5008953A
Cited
US5016255A
Cited
US5022047A
Cited
US5056109A
Cited
US5101501A
Cited
US5109390A
Cited
US5073900A
Cited
US5025452A
Cited
US5018165A
Cited
US5081642A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-01-03 | 1997-07-05 | 1998-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-01-03 | 2001-07-05 | 2002-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-01-03 | 2005-07-05 | 2006-01-04 | $7700.00 | Window Closed / Lapsed |